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cortex_a/r/m: fix handling of un-examined cores

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On multi-core systems, with some cores in power-down state, examination
will fail for these cores. Make sure assert- and deassert_reset functions
don't crash due to uninitialized variables.

Change-Id: I472f8d19af2cd3c770c05f3e57a31b35a863b687
Signed-off-by: Matthias Welwarsky <matthias.welwarsky@sysgo.com>
Reviewed-on: http://openocd.zylin.com/3552
Tested-by: jenkins
Reviewed-by: Jiri Kastner <cz172638@gmail.com>
Reviewed-by: Tomas Vanek <vanekt@fbl.cz>
This commit is contained in:
Matthias Welwarsky
2016-08-05 21:50:33 +02:00
committed by Freddie Chopin
parent 75c3f4a25c
commit 0099430104
2 changed files with 31 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
src/target/cortex_m.c
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@@ -981,6 +981,18 @@ static int cortex_m_assert_reset(struct target *target)
bool srst_asserted = false;
if (!target_was_examined(target)) {
if (jtag_reset_config & RESET_HAS_SRST) {
adapter_assert_reset();
if (target->reset_halt)
LOG_ERROR("Target not examined, will not halt after reset!");
return ERROR_OK;
} else {
LOG_ERROR("Target not examined, reset NOT asserted!");
return ERROR_FAIL;
}
}
if ((jtag_reset_config & RESET_HAS_SRST) &&
(jtag_reset_config & RESET_SRST_NO_GATING)) {
adapter_assert_reset();
@@ -1101,7 +1113,8 @@ static int cortex_m_deassert_reset(struct target *target)
enum reset_types jtag_reset_config = jtag_get_reset_config();
if ((jtag_reset_config & RESET_HAS_SRST) &&
!(jtag_reset_config & RESET_SRST_NO_GATING)) {
!(jtag_reset_config & RESET_SRST_NO_GATING) &&
target_was_examined(target)) {
int retval = dap_dp_init(armv7m->debug_ap->dap);
if (retval != ERROR_OK) {
LOG_ERROR("DP initialisation failed");